9. 2010

10. 2010

In honor of her role as Smurfette in the upcoming Smurfs movie, Perry wore a bright blue wig to the MTV Movie Awards.

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11. 2010

For the MuchMusic Video Awards in Toronto, she chose mauve lipstick and loose, grown-up waves.

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12. 2011

Perry's Grammy Awards look was inspired by her outfit. "Katy's look was angelic, sparkly and ethereal," said her makeup artist Jake Bailey. "I wanted to play off the textures in the dress and wings." He swept lavender cream eye shadow across the lid and followed with a dusting of springy green shadow on the bottom lash line.

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13. 2011

"If you see a ginger haired girl that looks like me, it's me!" Perry tweeted before the Canadian launch of her Purr fragrance. The singer remarked that she was spending three weeks as a redhead before going back to blonde.

Kristina Bumphrey/Startraksphoto.com

14. 2011

Perry appeared at the premiere of The Smurfs with newly-blonde locks and Smurfette-blue liner.

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15. 2011

Perry settled on a vibrant lilac hue for the MTV Video Music Awards.

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16. 2011

At the American Music Awards, Perry decorated her hot pink chignon with cellophane flowers.

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17. 2011

Costume switch at the AMAs! For her second look, Perry matched her fuchsia lipstick to her '40s-style pompadour.

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18. 2011

There she goes again! Perry switched up her look, chopping her locks into an angled bob and lightening the hue to a baby-pink.

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19. 2012

"Katy wanted to go this particular color blue for a few weeks now," colorist Rita Hazan told us of Perry's new look. "The blonde was not an interim color. She wanted to be blonde at the time, but knew it wouldn't be permanent, just another Katy Perry look! It didn't take long to transition to this color."

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20. 2012

For Nickelodeon's Kids' Choice Awards, Perry opted for a blue and purple-streaked high ponytail.

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21. 2012

"Her new color is what I call purple velvet," colorist Rita Hazan told InStyle.com of Perry's latest look. "It's dark and rich. It's very punk rock. I love creating colors for her because she always knows how to rock it!"

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22. 2012

There she goes again! Perry went back to black, complementing the dramatic hue with an angled cut.

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23. 2012

For her movie's European premiere, Perry swept back her violet-tinged locks into a '60s-inspired updo.

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24. 2012

Perry went back to black for Comedy Central's Night of Too Many Stars.